ASF ® - Audi Space Frame aluminum alloy frame and body shell construction x 6.0 liter DOHC aluminum alloy 450 hp 15 degree V-angle and 72 degree bank angle W12 engine, twin overhead camshafts with 4-valves per cylinder, rollertype rocker fingers, hydraulic valve lifters, variable timing control for inlet and exhaust camshafts x 6-speed automatic transmission with Tiptronic® and DSP Dynamic Shift Program (selects from over 200 shift programs to match driver's needs), hill detection capability and "Sport-mode" setting x quattro ® IV - permanent all-wheel drive system, includes Torsen® torque sensing center differential x Audi adaptive air suspension - four corner air suspension with air spring strut at each wheel, infinitely variable damping, automatic load-leveling and various driver controlled handling modes select via MMI (combinations of damping characteristics and ground clearance) x Anti-lock brake system (ABS 5.3) with front and rear Electronic Differential Locks (EDL) and Electronic rear Brake force Distribution x Servotronic® - vehicle speed-sensitive power rack & pinion steering x ESP 5.7 - Electronic Stabilization Program x CFC-free (ChloroFlouroCarbon) air conditioning refrigerant x